Halo: Add master switch to disable Halo (2/2)
Also did some cleanup.
Settings: Improve Recents (1/2)

- Moved Kill-All option to RB Settings
- Create list preference for different options
- Remove ugly Kill-All button and replace it with image
- Give the user the option to specify location of image (Bottom/Top/Left/Right)
- Add RB Icon for No recents apps
- Move recent items to the middle
- Add header to recent items
- Switch app icons to the right of recent items
Show application's package name in the "App info" screen.

Change-Id: I7dac8ffa0b10abb5ff235750e90a96d801b2f919
Merge remote-tracking branch 'upstream/jb-mr1' into jb-mr1